#282B57
Closest named color: Prussian Blue (#1D3557). oklch(31.1% 0.078 277.9), rgb(40, 43, 87).
Aa
White text reads best on this color (13.34:1).
About this color
#282B57 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.078 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.033 away. White text reads best on it, at 13.34:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.57:1 |
| White text | 13.34:1 |
Values
| HEX | #282B57 |
| RGB | rgb(40, 43, 87) |
| HSL | hsl(236, 37%, 25%) |
| OKLCH | oklch(31.1% 0.078 277.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #282B57 | 13.34:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #282B57 | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #282B57 text on white | 13.34:1 | AAA | Lc 99.6 | Preferred for body text |
| #282B57 text on black | 1.57:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FC
oklch(88.6% 0.052 276.9)
-
Step 300
300
#B2BBFC
oklch(80.8% 0.092 278)
-
Step 400
400
#8C95FB
oklch(70.7% 0.148 278.1)
-
Step 500
500
#7277F8
oklch(63.1% 0.189 277.8)
-
Step 600
600
#5D5CE7
oklch(55.7% 0.205 277.7)
-
Step 700
700
#4D4AC9
oklch(49.1% 0.191 277.7)
-
Step 800
800
#3F3EA2
oklch(42.7% 0.157 277.9)
-
Step 900
900
#353681
oklch(37.7% 0.123 278.1)
-
Step 950
950 (this color)
#282B57
oklch(31.1% 0.078 277.9)
#282B57 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #183159 | 0.026 |
| Deuteranopia (no green cones) | #142D56 | 0.027 |
| Tritanopia (no blue cones) | #15343C | 0.068 |
| Achromatopsia (no color) | #2F2F2F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #282B57
#282B57
oklch(31.1% 0.078 277.9)
- #393000
#393000
oklch(31% 0.064 97.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #282B57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.033
- Marine #042E60 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.050
- Marine Blue #01386A ΔE 0.054
- Oxford Blue #1B263B ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.058
- Midnight Green #073B4C ΔE 0.065
Use #282B57 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.